mamod fairlie
Posted: Thu Jan 03, 2008 1:25 pm
this was an idea i had, i cant remember how i got the idea. but perhaps one i shall make one.
this was an idea i had, i cant remember how i got the idea. but perhaps one i shall make one.
Garden Railway Forum
An international forum for garden railway modellers in all scales and gauges. It is free to join and is funded through voluntary contributions by its members. Many thanks to all those who keep it going.
https://gardenrails.org/forum/
mamod fairlie
Page 1 of 1
this was an idea i had, i cant remember how i got the idea. but perhaps one i shall make one.
Posted: Thu Jan 03, 2008 2:07 pm
thats wicked, I may try making a Edrig one in photoshop when I get it!
Re: mamod fairlie
Posted: Thu Jan 03, 2008 2:18 pm
It's not a Farlie unless it articulatesandysleigh wrote:
this was an idea i had, i cant remember how i got the idea. but perhaps one i shall make one.
!Posted: Thu Jan 03, 2008 2:21 pm
darn straight!
Posted: Fri Jan 04, 2008 12:44 pm
Hmm you dont notice it doesnt articulate untill somebody points it out.
Posted: Fri Jan 04, 2008 9:32 pm
u'd also notice wen it dosn't go around corners cuz it's too long. LOL
Posted: Sat Jan 05, 2008 9:09 am
In the Transport Museum in Dresden there is an early Fairlie type loco which is very similar to your concept here as it has two boilers, etc.
I'll see if I can find a photo when I return to Glasgow late tonight.
Chris Cairns.
I'll see if I can find a photo when I return to Glasgow late tonight.
Chris Cairns.
Posted: Sat Jan 05, 2008 1:53 pm
kwl
Posted: Sun Jan 06, 2008 10:49 am
Here's the photo of the loco in the Dresden Transport Museum.
Courtesy of the IRSociety's website here is some more information on this loco: -
'Decauville Type No.9. Duplex Jointed Locomotive, weighing 9½ tons empty (12 tons in working order) with two driving bogies and single boiler. Able to run over curves of 20 to 35 metres radius and ascend 8% gradients with 19lb rails; 600mm or 750mm gauge.'
and
The "Duplex Jointed Locomotive" was, of course, a double Fairlie. This design was prepared by Pechôt and Bourdon in 1888 as part of their military railway equipment and has in the past been described as the Pechôt-Bourdon locomotive, with the inference that it was an improved Fairlie. The "improvements" are supposed to have been the use of a single dome and (allegedly) a single firebox. The single dome was a feature of early Fairlies, as was the parallel boiler: Fairlie abandoned this layout in favour of the wagon-top boiler with two domes to increase the steam space and reduce priming, so the "improvement" was neither original nor sensible. The locomotive did not have a single firebox either. Fairlie's first locomotive had a single box and it was a failure. Pechôt and Bourdon did not make the same mistake and the illustration shows that there was an inspection firedoor (for the driver's benefit) on either side of the reversing quadrant. The only deviation from standard Fairlie practice was in the layout of the flexible steam pipes, so the locomotive is quite correctly called a Fairlie. These would have been no more powerful than the Mallets, but would have ridden better and caused less damage to the track. They were not very successful, however, because the fireboxes were too small and they were always short of steam.
Although it was a single boiler it had 2 chimneys, 2 domes with safety valves, and I'm pretty sure that it had 2 regulators on the dome inside the cab, which you can just see on the illustration.
Chris Cairns.
Courtesy of the IRSociety's website here is some more information on this loco: -
'Decauville Type No.9. Duplex Jointed Locomotive, weighing 9½ tons empty (12 tons in working order) with two driving bogies and single boiler. Able to run over curves of 20 to 35 metres radius and ascend 8% gradients with 19lb rails; 600mm or 750mm gauge.'
and
The "Duplex Jointed Locomotive" was, of course, a double Fairlie. This design was prepared by Pechôt and Bourdon in 1888 as part of their military railway equipment and has in the past been described as the Pechôt-Bourdon locomotive, with the inference that it was an improved Fairlie. The "improvements" are supposed to have been the use of a single dome and (allegedly) a single firebox. The single dome was a feature of early Fairlies, as was the parallel boiler: Fairlie abandoned this layout in favour of the wagon-top boiler with two domes to increase the steam space and reduce priming, so the "improvement" was neither original nor sensible. The locomotive did not have a single firebox either. Fairlie's first locomotive had a single box and it was a failure. Pechôt and Bourdon did not make the same mistake and the illustration shows that there was an inspection firedoor (for the driver's benefit) on either side of the reversing quadrant. The only deviation from standard Fairlie practice was in the layout of the flexible steam pipes, so the locomotive is quite correctly called a Fairlie. These would have been no more powerful than the Mallets, but would have ridden better and caused less damage to the track. They were not very successful, however, because the fireboxes were too small and they were always short of steam.
Although it was a single boiler it had 2 chimneys, 2 domes with safety valves, and I'm pretty sure that it had 2 regulators on the dome inside the cab, which you can just see on the illustration.
Chris Cairns.
Posted: Sun Jan 06, 2008 12:02 pm
I like that Chris.
There's a good drawing by Mike Seymour on here showing how it works.
www.frheritage.org.uk/wiki/Fairlie%27s_Patent
There's a good drawing by Mike Seymour on here showing how it works.
www.frheritage.org.uk/wiki/Fairlie%27s_Patent